Information
- Brand: OMEGA
- Made: 1946
- Model: Bumper
- Reference: CK 2421/1
- Calibre: 28.10 RA SC PC
- Movement: Automatic
- Material: Stainless steel
- Features/complications: Bumper automatic movement
- Dial: Off-white dial featuring an inner minute track with printed roman numeral hour indices and steel Dauphine hands
- Case dimensions: 35 mm
- Bracelet/strap: Leather strap
- Accessories: -
- SKU: 03301
Essay
The calibre 28.10 is one of the earliest OMEGA automatic which includes 17 jewels and an early bumper movement.
A "bumper" is an early type of automatic movement. Unlike the few modern automatics, where the rotor completes a full 360-degree rotation, the rotor in a bumper moves back and forth in an arc of about 180 degrees, bouncing off springs positioned on opposite sides.